Drilling and reaming device



F. L. SEITZ DRILLING AND REAMING DEVICE Aug. 2, 1932.

- Filed July 31, 1930 3 Sheets-Sheet 1 fiwemr: faevse/c/a 1. 55/72 y.

m M/ filo/ways:

.i I e i 2 i l i Aug. 2, 1932. F. 1.. SElTZ 1,869,514

DRILLING AND REAMING DEVICE Filed July 51, 1930 .5 Sheets-Sheet 2fkEQEE/C/r A. 65/72,

Aug. 2, 1932. F. SElTZ 1,869,514

DRILLING AND REAMINQ DEVICE Filed July 31, 1950- 3 Sheets-Sheet 3/7e=05/oe A 5.5/77,

I V i i y" M n M elevation of the I drill Patented Aug. 2, 1932 UNITEDSTATES PATENT OFFICEA FREDERICK DRILLING AND BEAMING nnvrcn Applicationfiled July This invention relates to drilling and reaming devices andhas: for its principal object to generally improve and flexible devicesof. this class, particularly when used in the drilling and reamingofstructural steel.

The novel features and advantages of the improved device will berendered apparent in view of the following description taken inconjunction with the drawings,'wherein:

Figure 1 is a plan of a drilling and reaming device and carriagetherefor constructed in accordance with the features of theinvention.

Figures 2 and 3 are, respectively, views in side and end elevationthereof.

Figures 4 and 5 are fragmentary views in orreamer-and sundryp'arts,shown removedfrom the carriage- Figure 6 is a diagrammaticillustration, showing the flexibility of operation ofthe device. e

Figures 7 and 7 a are detail views'in elevation and plan of a modifiedtype of postzor support for the device.

A feature which contributes/to theflexibility of the improved device isthe method of mounting the bit, when used for reamlng piled structuralshapes, for example, matically find its own axis'through a series ofsubdrilled or subpunched holes and produce a true hole the axis of whichis the mean of thecenters of all the holes subjected to the reamingoperation thus compensating for errors in the initial alinement of theholes, or, at the will of the operator, the device will ream at anydesired angle within its capaclty. Likewise, in drilling, the devicewill normally or grouped will autodrill parallel to its supporting post,but may be readily manipulated to (113111 813 practical ly any desiredangle. p

The driving unit ismounted on a carriage which in turn is supported by apost, an the latter may be either clamp d to a convenient support orpositioned on the work, as will hereinafter appear.

The reference numeral 5 designates the driving unit which is hereinshown as an electric or pneumatic drill motor, said motor be- L. snrrz,or GARY, INDIANA a1, 1930. Serial No. 472,088.

render more the ends of the yoke being connected driving unit wherebythe members 25 by means of a pivot pin26, and

ing mounted to swing laterally in a yoke 6 by means of trunnion plates 7which are secured to the motor housing, and have bearing in said yokeand are threadedinto said plates,

and 85 held rigid by means of an end piece 9. The yoke 6 is swingablymounted in a hanger bracket 10 andis held in place by means ofhexa-gonally headed and threaded pins 12.

By means of thistype of mounting, the motor or driving unit is permittedto have a universal movement, the yoke 6 and hanger bracket 10 providinga true universal joint assemblyy The foregoing assembly and driving unitare mounted in a lever frame 13 by means of the pins 12, which extendthrough said frame and hanger and are threaded into the yoke 6, saidframe having a control handle 14 secured to the one extremity'thereof. I

The universal joint assembly and the unit supported thereby asjustdescribed are normallyheld parallel with a supporting post 15 bymeans of a hook bolt and spring assembly andparallelogram assembly, thefirst- 75 named assembly comprising a hook bolt 16; cap .17, spring 18,sleeve 19, spring cover 20 and slide hook 21, the cap '17 being formedwith a dove-tail groove and is secured to the top of the motor housing,the slide hook 21 being adjustably anchored in said groove. The hookbolt 16 receives the sleeve 19 and spring 18 and is passedthrough thetop of the hanger bracket '10 and engages the slide hook 21. r a Theparallelogram assembly comprises the hanger 10, above described, link22, spring '23, bracket 24 and track rails or like members 25, thebrackets 24 being rigidly secured in up- 00 right position. to oneextremity ofsaid tracks 25 and the link 22 serving as a pivotalconnecting member for the brackets 24 and hanger 10. The lever frame 13is pivotally secured to the one extremity of the'track 95 the springs 23are connected at opposite ex- I tremities, respectively, to holder 27which is secured to brackets 28 which are welded or .otherwise'fastenedto the spring brackets 24,

punched or where and holders 29 which are threaded into the pins 12.

The post has pivotally mounted thereon a carriage 30 formed with sleeve31 having a working fit on said post. Rollers 32 are rotatably mountedon said carriage and the tracks 25 have movement on said rollers so thatthe device as a whole may be reciprocated on said carriage and pivotallymoved about said post. The tracks 25 are rigidly connected by crossbraces '33, diagonal braces 34 and end bolt 35 and sleeve 35a, thelatter preventing overrunning of the tracks or track rails on thecarriage.

The track rails 25 are provided with guide pieces or brackets 36, whichserve to guide and steady the lever frame 13 when the device is workingat an angle to the post 15 or when. the said lever frame 13 is out ofalinement with the rails 25.

The carriage sleeve has bearing on an annular shoulder 37 formed on thepost 15, the latter projecting slightly above the upper end ofthe sleeveand a key or pin 38 being passed therethrough, to prevent verticaldisplacement of thesleeve relatively to said post.

The post may be adjusted vertically by means of adjustment screw 39, andin conjunction with or in addition to this adjustment, bushings 40 maybe placed on top or at the bottom of the sleeve 31.

In Fig. 2 the post 15 is shown clamped to the work by means of bracket41 and screw 42. However, other means'may be employed, such as a magnet,as indicated diagrammatically in dotted lines at 43.

convenient type of post particularly adapted for application to astructural shape or beam which has been previously drilled or there areholes to receive screw bolts, is shown in Figs. 7- and 7a. In thisinstance thepost 15a is provided with a base 44 which is formed with aplurality of holes 45. The base is shown as of triangular shape and isprovided with angularly spaced positioning screws 46, on which the baserests, said screws being adjustable and may be locked in adjustedposition by nuts 47. The holes 45 are adapted to receive bolts or pinswhich may be passed through the base and extend into holes formed in thebeam or member on which the device is working or in any other convenientor adjacent support.

The flexibility of operation of the device will be apparent from theforegoing description and drawing When conditions are such as to requirea position of the device at an angle to its supporting post, then theparts 16, 17, 18, 19 and 21 come into play and permit the device to takeany desired position, either automatically or at the will of theoperator, to produce holes in perfect alinement. For instance, on curvedor other surfaces not ninety degrees to post 15 or 15*, the operator candrill or ream, without making any adjustments, holes at any requiredangle up to the capacity of the machine (note the diagrammaticrepresentation in Fig. 6) by simply controlling the position of the axisof the driving unit and bit by manipulation of the control handle 14.

Thelateral movement caused by the coordinate of the are generated byraising and lowering of the handle 14, the axis of the machine beingheld normally parallel to its supporting post by the action of themovable parallelogram construction formed by the parts 22, 24, 10, 23 iscompensated for by the track assembly which is movably mounted on thecarriage 30, and this movement also governs therange of track travel. 1The carriage sleeve 31, being pivotally mounted on .the post 15, permitsthe device to swing horizontally in a full circular are, limitedradially only by the track travel on the carriage. The springs 23balance the weight of the vertically movable parts.

The drill or reaming device, having. a universal movement, will followthe lines of least resistance, so that when reaming a series ofsubdrilled or subpunched holes in layers or piled structural shapes, thebit will find its own axis and produce a true hole having an axis whichis the mean of the centers of the holes reamed, thus compensating forerrors in the alinement of holes in such material. lVhat is claimed asnew is:

-1. A drill and reaming device comprising a supporting post, a carriagepivotally mounted on said post for swinging movement about thelongitudinal axis of said post, track rails mounted for travel on saidcarriage, a lever frame pivotally connected to said rails for swingingmovement at right angles to the swinging movement of said carriage, ahanger bracket pivotally mount d in said lever frame, a yoke pivotallymounted for swinging movement in said hanger bracket in a directionparallel to the longitudinal axis of said lever frame, a driving unitpivotally mounts ed in said yoke for swinging movement in a direction atright angles to the longitudinal axis of said lever frame, means fornormally maintaining said hanger bracket parallel with said supportingpost regardless of the position of said lever frame relative to saidrails'and resilient means for normally biasing said driving unit intoparallel position with said hanger bracket.

2. Adrill and reaming device comprising a supporting post, a carriagepivotally mounted on said post for swinging movement about thelongitudinal axis of said post, track rails mounted for travel on saidcarriage, a lever frame pivotally connected to said rails for swingingmovement at right angles to the swinging movement of said carriage, ahanger bracket pivotally mounted in said lever frame, a yoke pivotallymounted for swinging movement in said hanger bracket in a directionparallel to the longitudinal axis of said lever frame, a driving unitpivotally mounted in said yoke for swinging movement in a direction atright angles to the longitudinal axis of said lever frame, means fornormally maintaining said hanger bracket parallel with said supportingpost regardless of the position of said lever frame relative to saidrails and means for normally biasing said driving unit parallel withsaid hanger bracket, said means comprising a hook bolt and springassembly forming a connection between the upper end of said driving unitan [5 said hanger bracket, and a parallelogram assembly includingbrackets rigidly connected to said track and links connecting saidbrackets and said hanger bracket.

3. In a drill and reaming device, a pair of track rails, a lever framepivotally mounted on said rails for vertical swinging movement, aninverted U-shaped hanger bracket pivotally mounted in said lever framefor swinging movement'about a horizontal axis, a yoke pivotally mountedin said hanger bracket for swinging movement about a horizontal axis ina direction parallel to the longitudinal axis of said lever frame, adriving unit pivotally mounted in said yoke for swinging movement in adirection at right angles to the lon- I gitudinal axis of said leverframe, a spring having a connection with the upper end of said drivingunit and said hanger brackets for normally biasing said driving unitinto parallel position with saidhanger bracket and a parallelogramassembly including said hanger bracket for maintaining saidhangeribr'acket in vertical position regardless of the position of saidlever frame relative to said rails. 40 In testimony whereof, I havehereunto set my hand.

FREDERICK L. SEITZ.

